/// <summary>
        /// Initializes a new instance of the <see cref="TwitterCardPlayer" /> class.
        /// </summary>
        /// <param name="username">The Twitter username associated with the page e.g. @RehanSaeedUK. This is a required property.</param>
        /// <param name="image">The image to be displayed in place of the player on platforms that don’t support iframes or inline players. 
        /// You should make this image the same dimensions as your player. Images with fewer than 68,600 pixels 
        /// (a 262x262 square image, or a 350x196 16:9 image) will cause the player card not to render. 
        /// Image must be less than 1MB in size.</param>
        /// <param name="player">The video player.</param>
        /// <exception cref="System.ArgumentNullException">username is <c>null</c>.</exception>
        public TwitterCardPlayer(string username, TwitterImage image, TwitterPlayer player) : base(username)
        {
            if (image == null) { throw new ArgumentNullException(nameof(image)); }
            if (player == null) { throw new ArgumentNullException(nameof(player)); }

            this.Image = image;
            this.Player = player;
        }
        /// <summary>
        /// Initializes a new instance of the <see cref="TwitterCardPlayer" /> class.
        /// </summary>
        /// <param name="username">The Twitter username associated with the page e.g. @RehanSaeedUK. This is a required property.</param>
        /// <param name="image">The image to be displayed in place of the player on platforms that don’t support iframes or inline players.
        /// You should make this image the same dimensions as your player. Images with fewer than 68,600 pixels
        /// (a 262x262 square image, or a 350x196 16:9 image) will cause the player card not to render.
        /// Image must be less than 1MB in size.</param>
        /// <param name="player">The video player.</param>
        /// <exception cref="System.ArgumentNullException">username is <c>null</c>.</exception>
        public TwitterCardPlayer(string username, TwitterImage image, TwitterPlayer player) : base(username)
        {
            if (image == null)
            {
                throw new ArgumentNullException(nameof(image));
            }
            if (player == null)
            {
                throw new ArgumentNullException(nameof(player));
            }

            this.Image  = image;
            this.Player = player;
        }